A responsible GOP will roll back as much of the six years of Obama/Reid/Pelosi irresponsibility as possible. That will require conservative governance and adherence to principle, traits McConnell is not yet known to possess.
I anticipate Mitch and both Houses will be much more conservative. Considering the Election, he may have actually played things right to stay in the shadows dodging and weaving.
Even though the Tea Party ‘ORGS’ did not kick a lot of butt in the election, real grassroot Tea Party type folks did and the GOP knows it.